There are three main ways plexiglass is manufactured. Each style of plexiglass acrylic has its own advantages and disadvantages. This article will outline the differences.
Cell Cast Acrylic Sheet
- This style is produced by melted liquid PMMA resin poured between two plates of glass
- Least amount of expansion and contraction
- Highest margin of error on thickness tolerance
- Standard thickness tolerance from .118” - .500” is +/- 8%
- This is the best material to use when cutting or routing
- Highest molecular weight
- Widest range of colors available
- Standard material for signs, aquariums, and high-end fabrication
Continuous Cast Acrylic Sheets
- This style is produced by pouring melted liquid PMMA resin between two belts of polished stainless steel
- Best material consistency
- Least amount of expansion and contraction
- 2nd best thickness tolerance
- Widest ranges of sizes available up to 9’ wide and 16’ long
- Standard material for forming, fabrication, and skylights
Extruded Acrylic Sheets
- Semi-soft melted resin is pushed between rollers and cut to size
- Highest internal stress within the sheet
- Most expansion and contraction
- Generally, the best thickness consistency
- Thickness tolerance +/- 10%
- Softest sheet
- Gums up routers more when cutting
- Easy to glue
- Standard material for displays, and replacement windows. Some signage acrylic sheet uses.
